Tub surround question

We purchased a Kohler Archer 3 wall alcove tub for our new bathroom and had planned to install a 3 wall surround system but now it appears that there are no compatible Kohler surround walls made for this model(didn't do our homework). The tub has already been installed so changing it isn't an option at this point. What other options do we have?

We settled on the TI-5 because of the cost difference although I would have preferred a 3-piece. The panels are very attractive and appear to be good sturdy quality, but we haven't installed it yet so I can't really give an opinion. We're extremely pleased with the Archer tub, but there aren't many prefab surround options for it. Good luck.